<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>目录</title>
</head>
<body>
    <h1>目录</h1>
    <form id="upForm" enctype="multipart/form-data">
    用户名：<input name="username" required /><br />
    密码：  <input type="password" name="password" required /><br />
    文件：  <input type="file" name="file" required /><br />
    <button type="submit">提交</button>
  </form>  
</body>
</html>